Downloads of the open source Firefox browser have hit the 25 million mark since its release in November last year, according to figures from the Mozilla Foundation.

The 'Spread Firefox' volunteer advocacy group, which promotes the browser around the world, has grown to more than 70,000 members, the foundation added, and Mozilla Foundation volunteers have translated the software into 28 languages.

"Twenty five million Firefox downloads is a significant achievement, and we see that number continuing to grow," said Mitchell Baker, president of the Mozilla Foundation.

"Firefox is being rapidly adopted by the mainstream, with this audience embracing Firefox as a more user-friendly web browsing solution."

Mozilla Firefox 1.0 can be downloaded here for free, or purchased in a CD-Rom edition with the Firefox Guidebook from the Mozilla Foundation here.